/Engine/Source/Runtime/Engine/Classes/Engine/BlueprintGeneratedClass.h
Returns the pin that caused the specified property to be created (can return nullptr if the association is unknown or the association is from an object instead)
[UEdGraphPin](API\Runtime\Engine\EdGraph\UEdGraphPin) * FindPinThatCreatedProperty ( class [FProperty](API\Runtime\CoreUObject\UObject\FProperty) * AssociatedProperty ) const